CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS (Relationship with Brandywine Construction & Management, Inc. (“BCMI”)) (Details) $ in Thousands	1 Months Ended
	Jan. 31, 2013 USD ($)	Mar. 31, 2008 USD ($) subsidiary	Dec. 31, 2015 Real_Estate_Investment_Trust
Related Party Transaction [Line Items]
Gain on sale of investments	$ 1,600
Brandywine Construction & Management, Inc. (BCMI) [Member]
Related Party Transaction [Line Items]
Number of entities managed by related parties | Real_Estate_Investment_Trust			1
Interest owned in indirect subsidiaries, percent sold		19.99%
Number of Indirect Subsidiaries, Number | subsidiary		2
Amount received from selling a portion of interest in real estate investment		$ 1,000
Interest owned in indirect subsidiaries, selling fees		130
Gain on sale of investments		612
Amount received per 1% of interest purchased		$ 50
Interest owned in indirect subsidiaries, future sales increments		1.00%